NTA Abhyas NEET2020ChemistryClassification of Elements and Periodicity in PropertiesPractice
The table gives the first four ionization energies in k J m o l - 1 of four elements (the letters are not the symbols for the elements). Which element occurs in Group 13 of the periodic table?
Options
- AI E 1 I E 2 E l e m e n t P 502 4569 I E 3 I E 4 6919 9550
- BI E 1 I E 2 E l e m e n t Q 526 7305 I E 3 I E 4 11822 -
- CI E 1 I E 2 E l e m e n t R 584 1823 I E 3 I E 4 2751 11584
- DI E 1 I E 2 E l e m e n t S 796 1583 I E 3 I E 4 3238 4362
Correct answer
C. I E 1 I E 2 E l e m e n t R 584 1823 I E 3 I E 4 2751 11584
Step-by-step solution
After losing three electrons in element R, there is sudden huge increase in IE from 2751 to 11584 kJ/mol. It means that after three electrons, some stable configuration is achieved. This is applicable to group 13 elements with outer configuration of n s 2 n p 1 .